Function: dvpp_jpeg_predict_dec_size

Applicability

Product	Supported (√/x)
Atlas A3 training products / Atlas A3 inference products	√
Atlas A2 training products / Atlas A2 inference products	√
Atlas training products	√
Atlas inference products	√
Atlas 200I/500 A2 inference products	√

Function Usage

Predicts the size of the output memory allocation required for JPEG decoding based on the JPEG input memory.

Prototype

C Prototype

        
             aclError acldvppJpegPredictDecSize(const void *data, uint32_t dataSize, acldvppPixelFormat outputPixelFormat, uint32_t *decSize)

Python Function

        
             dec_size, ret = acl.media.dvpp_jpeg_predict_dec_size(data, data_size, format)

Parameter Description

Parameter	Description
data	Int, pointer address of the memory location that stores the JPEG image data on the host.
data_size	Int, memory size, in bytes.
format	Int, format of the decoded output image. For details, see acldvppPixelFormat.

Return Value Description

Return Value	Description
dec_size	Int, pointer address of the predicted allocation in bytes for the output after the JPEG image is decoded.
ret	Int, error code: 0 on success; else, failure.

Reference

For details about the API call sequence and example, see JPEGD.

Parent topic: JPEGD